Application: shore A is designed to measure the penetration hardness of rubber, elastomers and other rubber like substances such as neoprene, silicone, and vinyl. It can also be used for soft plastics, felt, leather and similar materials.Shore D is designed for plastics, Formica, Epoxies and Plexiglass.Model: HT6510A HT6510DProduct info: digital durometer for shore hardness testing pocket size model with integrated probeTest scale: shore hardnessStandards: DIN53505, ASTMD2240, ISO7619, JISK7215Parameters displayed: hardness result, average value, max. valueMeasurement range:0-100HA(HD)Measurement deviation: <1%HResolution: 0.1Auto switch offWith RS232C interfaceOperating conditions: 0C to 40CPower supply: 4x1.5V AAA (UM-4) batteryBattery indicator: low battery indicatorDimensions: 162x65x38mmWeight (not including probe):173gOptional accessories : Cable+software for rs232C.